Grinding gauge



A. KLEPAL GRINDING GAUGE June 5, 1951 Filed June. 28,v 1949 FIG.

INVENTOR. ALBHT KLEWM.

Patented June 5, 14951 UNITED STATES f ATENT OFFICE GRINDING GAUGE Albert Klepal, Coraopolis, Pa.

Application June 28, 1.949, Serial No. 101,761

Claims.

This invention relates to an improved gauge, for use with a grinding Wheel, turning lathe, or the like, the primary object of the invention being to provide a gauge of this character which moves With the grinding wheel, lathe tool or the like across the work and indicates at all times during the grinding or machining, the amount of stock remaining to be removed, and the actual diameter of the work being ground or machined, while at the same time taking into consideration wear of the grinding wheel or turning tool, which is an important factor, particularly in finish cuts.

Another important object of the invention is the provision of a gauging device of the above indicated character which enables avoidance of grinding cylindrical portions undersize.

Another important object of the invention is to provide a device of the above indicated character which enables the operator of the grinding machine or the like to maintain a constant accurate check on the progress of the grinding or machin ing without interruptions to the process otherwise necessary for micrometer or other ordinary gauge checks.

Other important objects and advantageous features of the invention will be apparent from the following description and appended drawings, wherein, merely for present purposes of illustration, specic embodiments of the invention are set forth in detail.

In the drawings:

Figure 1 is a side elevation showing the illustrated device applied to a grinding machine and associated cylindrical work piece.

Figure 2 is an enlarged perspective view of the diameter arm.

Figure 3 is a group perspective view of the components of the depth arm.

Figure 4 is a perspective view of the radius arm.

Figure 5 is a group perspective view of the components of the gauge section.

Figure 6 is a perspective view of the assembled gauge section and radius arm; and,

Figure 7 is a fragmentary side elevation of a modied form.

Referring in detail to the drawings, the numeral 9 generally designates a grinding machine having the grinding wheel I3 partially enclosed at the top by the guard II. In the form of the invention shown in Figure 1, the guard I I has xed to rise therefrom a stationary standard or bracket I2 traversed by a clamping bolt I3. The bolt I3 passes through a longitudinally elongated slot I4 formed within the ends of a at elongated substantially horizontal diameter arm I3 terminat- 2 ing at one end in the bifurcation I6. The bifurcation is apertured at il to pass a handled clamping bolt or screw I 8.

The vertical depth arm I9 depends from the bifurcated forward end of the diameter arm and is composed of a vertically elongated plate 23 having a raised portion 2l on one side near its upper end defining a shoulder 2i', an apertured ear 22 on its upper end received in the bifurcation I6 on the diameter arm I5 and traversed by the clamping bolt I8, and the longitudinal runner 23 on the same side as the raised portion 2 I.

The depth arm I9 further comprises the vertically elongated plate 24 formed with a longitudinal slot 25 longer than the runner 253, and further formed with a raised portion 26 Aon one side formed as an apertured bifurcation 2T. The runner 23 slides in the slotl 25 and the plates 29 and 24 are maintained in superimposed sliding relation by a headed screw 29 passing through the slot 25 and threaded into the runner 23.

The gauge section, generally designated 36 is supported from the bifurcated lower end of the depth arm I9 by a bolt 3l traversing the bifurcation 26 and the arm 33 of the right angled radius arm 33. The remaining arm 34 of the radius arm 33 is longitudinally slotted at 35 t0 accommodate a clamping screw 36 on an overlying portion 36 secured to the gauge section 39.

As shown in Figures 5 and 6, the gauge section 30 comprises a vertically elongated base plate 31 formed in one side with a longitudinal vertical channel or slideway 38 opening at its upper end through the side of the plate 3l as indicated at 39. Slidable longitudinally in the slideway 38 is the flat gauge shoe body 49 having at its upper end a lateral pin 4I Working through the opening 39 and at its lower end a work engaging shoe i2 having an extension 43 projecting on the side of the body 49 opposite the pin l i The lower transverse edge 44 is rounded as indicated to traverse the Work piece 45 longitudinally and pass work cuts With minimum friction and catching in the work cuts. An expanding helical spring 46 is interposed between the abutment 4l at the upper end of the slideway 38 and the upper end of the body 4I) whereby the body 40 is urged downwardly in the slideway 38 toward a position in which the pin 4I is at the lower end of the opening 39 and the shoe B2 is spaced below the lower end of the base plate 3l.

The gauge section 39 further comprises the cover plate 48 apertured along its edges to pass screws 49 securing the cover plate to the base plate 3l and confining the shoe body 40 in place,

The cover Yplate has the lateral arm or portion 36 which is adjustably secured to the arm 34 of the radius arm 33 by the screws 36. On the same side as the arm 36 the cover plate 48 has a horizontal bubble level 49. I'he abutment 41 at the upper end of the base plate 31 has openings 50, 50 to accommodate the plunger of a dial indicator I mounted thereon, to be operated by the slide plate 40.

In the form of the invention shown in Figure 7, the support of the diameter arm I5 is modied to include a pin 52 on a horizontally elongated portion 53 of the bracket I2 and working in the slot I4 of the diameter arm I5, and a vertically elongated slot 54 in the .bracket provided in one edge with equally spaced notches 55 arranged to selectively receive therein a handled clamping bolt I3', corresponding in effect to the clamping bolt I3 of Figure 1, with the clamping bolt I3 passing through the slot I4 of the diameter arm I5. This arrangement provides for easier rough adjustment of the horizontal angulation of the diameter arm I5.

In using the device of the invention, the device is mounted as indicated on the bracket I2 or I2 and the diameter arm I5 is then set, by loosening the clamping bolt I3 or I3 andY extending or retracting and angulating the arm I5 to place the gauge section 35 at the center of the work piece 45 and at a suiiicient height to clear` the shoe 42 from the top of the work piece 45. The depth arm I9 is then adjusted for the correct clearance of the shoe 42 with the top of the work piece.

4 tically movable downwardly spring pressed plate mounted thereon having a shoe to constantly contact the work piece on a vertical center, and an indicator on said basey plate operated by displacement of said movable plate relative to said base plate, releasable clamping` means mounting said depth arm on the forward end of said diameter arm and providing for angulation of said depth arm relative to said diameter arm to enable more accurate centering of said gauge section relative to the workpiece than provided by an adjustment of said diameter arm, said depth arm comprising elements vertically adjustable relative to each other to enable more accurate contacting of the gauge section shoe with the work piece than provided by an adjustment of said diameter arm. Y

V2.In combination, a grinding gauge and a grinding machine having a grinding wheel and a wheel guard, a bracket fixed to rise from said guard substantially in the plane of the grinding Adjustment of the radius arm 33 is needed only when radius wheels are in use. On plain at work the gauge section can be in any position on the radius arm.

In setting the device it is necessary to have the gauge section 3B perpendicular, as indicated by the bubble levell. The bubble level 49 is parallel to the shoe 42 so that a proper setting assures the shoe being perfectly tangent to the work piece l5 and horizontal, or vertically centered with respect to the work piece 45 the spring 46 then acting to keep the shoe 42 in constant accurate contact with the work piece 4'5. This on center positioning of the shoe 52 allows ior grinding wheel wear as well as for depth of cut.

Accurate grinding of cylindrical portions is assured by the riding of the shoe 42 across the work piece, since thereby the dial indicator 5I thereby constantly indicates not only the depth of out but also the parallel of the work piece being ground.

The above described device can be readily adapted to use with machines of different sizes and forms and Work pieces of dierent sizes by adjusting the components relative to each other. The components also lend themselves readily to variation in size and shape to adapt the device to different types of work and machines such asY lathes, I-Iypros, and large boring mills.

What is claimed is:

1. In combination, a grinding gauge and a grinding machine having a grinding wheel and a Wheel guard, a bracket xed to rise from said guard substantially in the plane of the grinding wheel, a generally horizontal diameter arm projecting from said bracket beyond the grinding wheel to a point substantially perpendicularly above the center of a work piece to which the grinding wheel is applied, a depth arm secured to depend from the forward end of said diameter arm, a gauge section mounted on the lower end of said depth arm comprising a base plate, a ver-,-

wheel,` a generally horizontal diameter arm projecting from said bracket beyond the grinding wheel to a point substantially perpendiculariy above the center of a work piece to which the grinding wheel is applied, a depth arm secured to depend'from the forward end of'said diameter arm, a gauge section mounted on the lower end of said depth arm comprising a base plate, a vertically movable downwardly spring pressed plate mounted thereon having a shoe to constantly contact the work piece on a vertical center, and an indicator on said base plate operated Vby displacement o said movable plate relative to said base plate, a transverse bubble level on said base plate and releasable clamping means connecting the lower end of said depth arm to said gauge section whereby said gauge section can be adjusted relative to said depth arm and said diameter arm into perpendicular relation to the center of the work piece. Y Y

3. In combination, a grinding gauge and a grinding machine having a grinding wheel and a wheel guard, a bracket fixed to rise :from said guard substantially in the plane of the grinding wheel, a generally horizontal diameter arm projecting from said bracket beyond the grinding Wheel to a point substantially perpendicularly above the center of a work piece to which the grinding wheel is applied, a depth arm secured to depend from the forward end of said diameter arm, a gauge section mounted on the lower end of said depth arm comprising a base plate, a vertically movable downwardlyspring pressed plate mounted thereon having a shoe to constantly contact the work piece on a vertical center, and an indicator on said base plate operated by displacement of said movable plate relative to said base plate, a transverse bubble level on said base plate and releasable Vclamping means connecting the lower end of said depth arm to said gauge section whereby said gauge section can be adjusted relative to said depth arm and said diameter arm into perpendicular relation to the center of the work piece, said releasable clamping means comprising a radius arm comprising means for adjusting said gauge section laterally with respect to the vertical plane of the grinding wheel and laterally with respect to Vsaid depth arm. 4. In combination, a grinding gauge and a grinding machine having a grinding wheel and a wheel guard, a bracket fixed to rise from said guard substantially inthe plane of` the grind-V ing wheel, a generally horizontal'diameter arm projecting from said bracket beyond the grinding wheel to a point substantially perpendicularly above the center of a work piece to which the grinding wheel is applied, a depth arm secured to depend from the forward end of said diameter arm, a gauge section mounted on the lower end of said depth arm comprising a base plate, a vertically movable downwardly spring pressed plate mounted thereon having a shoe to constantly contact the work piece on a vertical center, and an indicator on said base plate operated by displacement of said movable plate relative to said base plate, releasable clamping means mounting said diameter arm on said bracket and permitting longitudinal adjustment of said diameter arm relative to said bracket and angulation of said diameter arm relative to said bracket to provide for vertical centering of said gauge section relative to the work piece and on center contact of said gauge section shoe with the work piece, said releasable clamping means com prising a clamping bolt on said bracket and passing through a longitudinal. slot formed in said diameter arm.,

5. In a grinding gauge for a grinding machine having a grinding wheel and a wheel guard, a bracket adapted to be Xed to rise from said guard substantially in the plane of the grinding wheel, a generally horizontal diameter arm projecting from said bracket beyond the grinding wheel to a point substantially perpendicularly above the center of a work piece to which the grinding wheel is applied, a depth arm secured to depend from the forward end of said diameter arm, a gauge section mounted on the lower end of said depth arm comprising a base plate, a vertically movable downwardly spring pressed plate mounted thereon having a shoe to constantly Contact the work piece on a vertical 6 center, and an indicator on said base plate operated by displacement of said movable plate relative to said base plate, releasable clamping means mounting said diameter arm on said bracket and permitting longitudinal adjustment of said diameter arm relative to said bracket and angulation of said diameter arm relative to said bracket to provide for vertical centering oi' said gauge section relative to the work piece and on center Contact of said gauge section shoe with the work piece, said releasable clamping means comprising a pin projecting laterally from said bracket and through a longitudinal slot formed in said diameter arm, a clamping bolt carried by said diameter arm and projecting through said slot, said bracket being formed with a vertical opening displaced from said pin toward the forward end of said bracket, said opening being formed along one vertical edge thereof with spaced notches arranged to selectively receive said clamping bolt to pcsiticn said diameter arm in a vertical plane at different angles with respect to the horizontal.

ALBERT KLEPAL.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 397,558 Lumley Feb, 12, 1889 1,341,935 Schustarich June 1, 1920 1,447,212 Kerr Mar. 6, 1923 1,815,049 Cole July 21, 1931 1,890,827 Pratt Dec.. 13, 1932 2,066,699 Skelton Jan. 5, 1937 2,691,527 Scaife Aug. 31, 193'? 

